High manganese concentrations in rocks at Gale crater, Mars

被引：74

作者：

Lanza, Nina L. ^{[1
]}

Fischer, Woodward W. ^{[2
]}

Wiens, Roger C. ^{[1
]}

Grotzinger, John ^{[2
]}

Ollila, Ann M. ^{[3
]}

Cousin, Agnes ^{[1
]}

Anderson, Ryan B. ^{[4
]}

Clark, Benton C. ^{[5
]}

Gellert, Ralf ^{[6
]}

Mangold, Nicolas ^{[7
]}

Maurice, Sylvestre ^{[8
]}

Le Mouelic, Stephane ^{[7
]}

Nachon, Marion ^{[7
]}

Schmidt, Mariek ^{[9
]}

Berger, Jeffrey ^{[10
]}

Clegg, Samuel M. ^{[1
]}

Forni, Olivier ^{[8
]}

Hardgrove, Craig ^{[11
]}

Melikechi, Noureddine ^{[12
]}

Newsom, Horton E. ^{[3
]}

Sautter, Violaine ^{[13
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

[3] Univ New Mexico, Inst Meteorit, Albuquerque, NM 87131 USA

[4] US Geol Survey, Flagstaff, AZ 86001 USA

[5] Space Sci Inst, Boulder, CO USA

[6] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[7] Univ Nantes, Lab Planetol & Geodynam, Nantes, France

[8] Univ Toulouse 3, Inst Rech Astrophys & Planetol, F-31062 Toulouse, France

[9] Brock Univ, Dept Earth Sci, St Catharines, ON L2S 3A1, Canada

[10] Univ Western Ontario, Dept Earth Sci, London, ON, Canada

[11] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA

[12] Delaware State Univ, Dept Phys & Engn, Dover, DE USA

[13] Museum Natl Hist Nat, F-75231 Paris, France

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 16期

关键词：

Mars; oxidation; manganese; chemical weathering; INDUCED BREAKDOWN SPECTROSCOPY; CHEMCAM INSTRUMENT SUITE; GUSEV CRATER; SPIRIT ROVER; MARTIAN SOIL; MERIDIANI-PLANUM; MN(II) OXIDATION; CURIOSITY ROVER; IRON-FORMATION; CHEMISTRY;

D O I：

10.1002/2014GL060329

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The surface of Mars has long been considered a relatively oxidizing environment, an idea supported by the abundance of ferric iron phases observed there. However, compared to iron, manganese is sensitive only to high redox potential oxidants, and when concentrated in rocks, it provides a more specific redox indicator of aqueous environments. Observations from the ChemCam instrument on the Curiosity rover indicate abundances of manganese in and on some rock targets that are 1-2 orders of magnitude higher than previously observed on Mars, suggesting the presence of an as-yet unidentified manganese-rich phase. These results show that the Martian surface has at some point in time hosted much more highly oxidizing conditions than has previously been recognized.

引用

页码：5755 / 5763

页数：9

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